Home / 121,284.90-181,862.55-42,401.70

Finding the Fourth Proportional to 121,284.90, 181,862.55 and 42,401.70

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Solution

The fourth proportional to 121,284.90, 181,862.55 and 42,401.70 is: 63,579.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,284.90 : 181,862.55 = 42,401.70 : x
  2. Step 2: Convert to fraction form
    121,284.90/181,862.55 = 42,401.70/x
  3. Step 3: Cross multiply
    121,284.90x = 181,862.55 × 42,401.70
  4. Step 4: Simplify right side
    121,284.90x = 7,711,281,286.34
  5. Step 5: Solve for x
    x = 7,711,281,286.34/121,284.90
  6. Step 6: Final answer
    x = 63,579.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.